Lindenboom and Van den Akker have demonstrated in 2003 that not administrating prophylactic antibiotics at all prior to bone augmentation elevates the rate of SSI significantly in comparison with a patient who receives antibiotics. On the other hand, our clinical experience shows that short term prophylactic antibiotics (up to 3 days post-operatively) in sinus augmentation surgery and other bone augmentations in the oral cavity do not elevate the risk of SSI. The need to prescribe antibiotics for more than 24 hours post-operatively was never evaluated in a clinical trial.